Level Five i. If the grievant is not satisfied with the disposition of the grievance at Level Four, the Association may submit the grievance to advisory arbitration not later than fifteen (15) school days after receipt of the decision by the Board. ii. Within ten (10) school days after such submission for arbitration, the Board and the Association shall attempt to agree upon a mutually acceptable arbitrator. If the parties are unable to agree upon an arbitrator, either shall request the Public Employment Relations Commission to appoint an arbitrator. iii. The arbitrator shall confer with the representative of the Board and of the Association and shall proceed with a hearing and submit a written report in the shortest possible time setting forth his findings of fact, reasoning and conclusions on the issues submitted. The arbitrator shall be without power or authority to make any decision, which requires the commission of an act prohibited by law or which is violative of the terms of the Agreement. The decision of the arbitrator shall be advisory only to the Board and the Association. iv. The costs for the services of the arbitrator, including per diem expenses and actual necessary travel, subsistence expenses and the cost of the hearing room shall be borne equally by the Board and the Association. Any other expenses incurred shall be paid by the party incurring same. v. If time is lost by any teacher due to arbitration proceedings necessitating the retention of a substitute, the Board of Education will pay only the cost of the substitute; the time lost by the teacher must either be without pay or charged to personal time; however, if the arbitrator subpoenas a teacher to attend the arbitration proceedings as a witness, this teacher shall not suffer loss of pay. vi. Notwithstanding the above, the parties agree that in not more than one (1) arbitration per contract year (non-cumulative) may be submitted to an arbitrator, whose decision shall be final and binding upon both parties. The Association shall have the right to designate which arbitration shall be so binding, provided such designation is made and communicated in writing prior to the commencement of the arbitration in question. The Association's choice shall be limited to a grievance which must have reached Level Two of the grievance procedure in any contract year governed by the agreement. vii. Notwithstanding the above, the parties agree that any dispute which involves a disagreement as to whether the health insurance benefits provided employees herein are equal to or better than the health insurance benefits heretofore provided employees through the New Jersey Public and School Employees Health Benefits Plan may be submitted to an arbitrator whose decision shall be final and binding on both parties.